#ifdef a

#include<stdio.h>
int main() {

	int number, one, ten;
	number = one = ten = 0;
	scanf("%d", &number);
	while (!(number >= 10 && number <= 99))
		scanf("%d", &number);
	ten = number / 10;
	one = number % 10;
	switch (ten) {
	case 2:printf("twenty"); break;
	case 3:printf("thirty"); break;
	case 4:printf("forty"); break;
	case 5:printf("fifty"); break;
	case 6:printf("sixty"); break;
	case 7:printf("seventy"); break;
	case 8:printf("eighty"); break;
	case 9:printf("ninty"); break;
	case 1:
		if (one == 1) {
			printf("eleven"); break;
		}
		else if (one == 2) {
			printf("twelve"); break;
		}
		else if (one == 3) {
			printf("thirteen"); break;
		}
		else if (one == 4) {
			printf("forteen"); break;
		}
		else if (one == 5) {
			printf("fifteen"); break;
		}
		else if (one == 6) {
			printf("sixteen"); break;
		}
		else if (one == 7) {
			printf("seventeen"); break;
		}
		else if (one == 8) {
			printf("eighteen"); break;
		}
		else if (one == 9) {
			printf("ninteen"); break;
		}
		else {
			printf("ten"); break;
		}
	}
	if (ten != 1) {

		switch (one) {

		case 1:printf("-one"); break;

		case 2:printf("-two"); break;

		case 3:printf("-three"); break;

		case 4:printf("-four"); break;

		case 5:printf("-five"); break;

		case 6: printf("-six"); break;

		case 7:printf("-seven"); break;

		case 8:printf("-eight"); break;

		case 9:printf("-nine"); break;

		case 0:printf("-zero"); break;
		}
	}
	return 0;
}
#endif 
